Extenders Are

Extenders are:

A) An "x" placed in the fourth-, fifth-, or sixth-character place when needed to enable the seventh character to remain in the seventh-character position
B) Alphabetic seventh characters used to complete the description of many codes by conveying additional information
C) Codes that are unspecified or are most often used with a condition
D) Codes located directly behind the main term and used only when the documentation has no additional detail on the condition or disease